CN103440678A - Visualization method and device for three-dimensional body data - Google Patents
Visualization method and device for three-dimensional body data Download PDFInfo
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Abstract
The invention provides a visualization method and device for three-dimensional body data. The visualization method for three-dimensional body data comprises the following steps: acquiring loading information of three-dimensional body data input by a user to generate a corresponding loading area; determining display resolution of the loading area and data blocks needed to be loaded to the loading area under the display resolution; tailoring the loading area to obtain the loading area which comprises all visual data blocks; respectively calculating the spatial position of each visual data block in a display screen according to a visual body and the display resolution; loading corresponding visual data blocks in the spatial position of each visual data block so as to display a three-dimensional graph on the display screen after all visual data blocks are loaded in the spatial position of the display screen so as to exhibit part of areas of three-dimensional body data by way of the three-dimensional graph. Furthermore, the data quantity loaded to the loading area under the display resolution is less than that of three-dimensional body data, so that the loading efficiency can be accelerated in the subsequent loading process.
Description
Technical field
The application relates to technical field of data processing, particularly a kind of three-dimensional data method for visualizing and device.
Background technology
Three-dimensional data is an equally distributed data acquisition of three-dimensional, the structured data be comprised of 3D grid.Volume drawing is to draw and the three-dimensional picture application technology shown for three-dimensional data, being an important field of research of visualization in scientific computing and computer graphics, is a kind of very important technology for the visual of volumetric data set by generations such as various types of three-dimensional equipment, scientific simulations.
Wherein the least member in three-dimensional data is called voxel.Generally, these three-dimensional datas can mean respectively the various attributes in different pieces of information source, as meaned with three-dimensional data the various attributes of medical scanning and earthquake data acquisition.
Provide a kind of three-dimensional data method for visualizing and device based on this application, showed in the three-dimensional picture mode in order to certain subregion by three-dimensional data.
Summary of the invention
The application's technical matters to be solved is to provide a kind of three-dimensional data method for visualizing and device, in order to certain subregion by three-dimensional data, in the three-dimensional picture mode, is showed.Technical scheme is as follows:
On the one hand, the embodiment of the present application provides a kind of three-dimensional data method for visualizing, comprising:
Obtain the load information of the three-dimensional data of user's input, generate the loading zone that described load information is corresponding;
Determine under display resolution that described loading is regional and described display resolution and need to be loaded into the regional data block of described loading, wherein said data block is divided equally after sampling to described three-dimensional data having described display resolution and having the data block of identical voxel of obtaining;
Cutting is carried out in described loading zone, obtain the described all viewdata pieces that zone comprises that load, wherein said viewdata piece is to be loaded into to load in regional data block visible data block in the what comes into a driver's body;
According to described what comes into a driver's body and described display resolution, calculate respectively the locus of each described viewdata piece at display screen;
Locus at each described viewdata piece loads corresponding described viewdata piece.
Preferably, determine that the regional display resolution of described loading comprises:
Obtain the view field of the regional outermost layer of described loading in view area, wherein said view area is the maximum magnitude that can show for figure in display screen;
Calculate the ratio of described view field and described view area;
According to formula D=R * (L-1) obtain the regional display resolution of described loading, the progression that wherein L is resolution, R is ratio, and it is set to 1 when R is greater than 1.
Preferably, cutting is carried out in described loading zone, obtains the described all viewdata pieces that zone comprises that load, comprising:
The coordinate on eight summits of each data block in described loading zone and the coordinate of described what comes into a driver's body are contrasted;
If the coordinate at least one summit of described data block is included in the coordinate of described what comes into a driver's body, the viewdata piece using described data block as described viewing area.
Preferably, according to described what comes into a driver's body and described display resolution, the locus of calculating respectively each described viewdata piece comprises:
According to the coordinate system of described what comes into a driver's body and the coordinate system in described loading zone, the coordinate of described viewdata piece is changed, obtain the coordinate of the viewdata piece of the coordinate system based on described what comes into a driver's body;
According to described display resolution, by the coordinate conversion of the viewdata piece of the described coordinate system based on described what comes into a driver's body, be the locus of described viewdata piece in display screen;
Locus at each described viewdata piece loads corresponding described viewdata piece, comprising: the depth of field of obtaining each described viewdata piece; The order drawn near according to the depth of field loads corresponding described viewdata piece successively on the locus of described viewdata piece.
Preferably, obtain the load information of the three-dimensional data of user's input, generate the loading zone that described load information is corresponding, comprising:
Obtain loading zone domain information and the logic flag information of the 3D solid data of user's input, wherein said loading zone domain information is the regional size information of described loading, and described logic flag information is for controlling the regional shape of described loading;
According to described loading zone domain information and described logic flag information, generate described loading zone.
On the other hand, the embodiment of the present application provides a kind of three-dimensional data visualization device, comprising:
Generation unit, the load information for the three-dimensional data that obtains user input, generate the loading zone that described load information is corresponding;
Determining unit, need to be loaded into the regional data block of described loading for determining under display resolution that described loading is regional and described display resolution, wherein said data block is divided equally after sampling to described three-dimensional data having described display resolution and having the data block of identical voxel of obtaining;
The cutting unit, for cutting is carried out in described loading zone, obtain the described all viewdata pieces that zone comprises that load, and wherein said viewdata piece is to be loaded into to load in regional data block visible data block in the what comes into a driver's body;
Computing unit, for according to described what comes into a driver's body and described display resolution, calculate respectively the locus of each described viewdata piece at display screen;
Loading unit, load corresponding described viewdata piece for the locus at each described viewdata piece.
Preferably, described determining unit comprises:
Obtain subelement, for obtaining the view field of the regional outermost layer of described loading in view area, wherein said view area is the maximum magnitude that can show for figure in display screen;
The first computation subunit, for calculating the ratio of described view field and described view area;
The second computation subunit, for foundation formula D=R * (L-1) obtain the regional display resolution of described loading, the progression that wherein L is resolution, R is ratio, and it is set to 1 when R is greater than 1;
Determine subelement, for determining under described display resolution, need to be loaded into the regional data block of described loading.
Preferably, described cutting unit specifically for: the coordinate on eight summits of described each data block that loads zone and the coordinate of described what comes into a driver's body are contrasted; If the coordinate at least one summit of described data block is included in the coordinate of described what comes into a driver's body, the viewdata piece using described data block as described viewing area.
Preferably, described computing unit specifically for: according to the coordinate system of described what comes into a driver's body and the coordinate system in described loading zone, the coordinate of described viewdata piece is changed, is obtained the coordinate of the viewdata piece of the coordinate system based on described what comes into a driver's body; According to described display resolution, by the coordinate conversion of the viewdata piece of the described coordinate system based on described what comes into a driver's body, be the locus of described viewdata piece in display screen.
Described loading unit is specifically for the depth of field of obtaining each described viewdata piece; The order drawn near according to the depth of field loads corresponding described viewdata piece successively on the locus of described viewdata piece.
Preferably, described generation unit is specifically for loading zone domain information and the logic flag information of obtaining the 3D solid data of user input, according to described loading zone domain information and described logic flag information, generate described loading zone, wherein said loading zone domain information is the regional size information of described loading, and described logic flag information is for controlling the regional shape of described loading.
Compared with prior art, the application comprises following advantage:
At first the three-dimensional data method for visualizing that the embodiment of the present application provides obtains the load information of the three-dimensional data of user's input, generates loading zone corresponding to load information, secondly determine to load under regional display resolution and this display resolution and need to be loaded into the regional data block of loading, carry out cutting to loading zone, obtain the interior visible data block of it what comes into a driver's body comprised as the viewdata piece, then according to what comes into a driver's body and display resolution, calculate respectively the locus at display screen of each what comes into a driver's body, load corresponding viewdata piece in the locus of each viewdata piece, thereby after the locus of display screen loads whole viewdata pieces, show a three-dimensional picture on display screen, the subregion of three-dimensional data is showed in realization in the three-dimensional picture mode.
Further, be loaded under display resolution and load the data volume that regional data volume is less than three-dimensional data, in the subsequent load process, can accelerate loading efficiency.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present application, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiment of the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of process flow diagram of a kind of three-dimensional data method for visualizing of providing of the application;
Fig. 2 is the schematic diagram of a kind of Octree of providing of the application;
Fig. 3 is a kind of data acquisition schematic diagram that the application provides;
Fig. 4 is the what comes into a driver's body schematic diagram that the application provides;
Fig. 5 is that the application provides a kind ofly loads regional schematic diagram;
Fig. 6 is that the another kind that the application provides loads regional schematic diagram;
Fig. 7 be the application provide another load regional schematic diagram;
Fig. 8 be the application provide another load regional schematic diagram;
Fig. 9 be the application provide another load regional schematic diagram;
Figure 10 (a) be the application provide another load regional schematic diagram;
Figure 10 (b) be the application provide another load regional schematic diagram;
Figure 10 (c) be the application provide another load regional schematic diagram;
Figure 10 (d) be the application provide another load regional schematic diagram;
Figure 10 (e) be the application provide another load regional schematic diagram;
Figure 10 (f) be the application provide another load regional schematic diagram;
Figure 11 is the camera parameter that provides of the application and the corresponding relation schematic diagram of what comes into a driver's body;
Figure 12 is the structural representation of a kind of three-dimensional data visualization device of providing of the application;
Figure 13 is the minor structure schematic diagram of a kind of three-dimensional data visualization device of providing of the application.
Embodiment
At first three-dimensional data method for visualizing the embodiment of the present application provided is briefly described, and can comprise:
Obtain the load information of the three-dimensional data of user's input, generate the loading zone that described load information is corresponding;
Determine under display resolution that described loading is regional and described display resolution and need to be loaded into the regional data block of described loading, wherein said data block is divided equally after sampling to described three-dimensional data having described display resolution and having the data block of identical voxel of obtaining;
Cutting is carried out in described loading zone, obtain the described all viewdata pieces that zone comprises that load, wherein said viewdata piece is to be loaded into to load in regional data block visible data block in the what comes into a driver's body;
According to described what comes into a driver's body and described display resolution, calculate respectively the locus of each described viewdata piece at display screen;
Locus at each described viewdata piece loads corresponding described viewdata piece.
After the locus of display screen loads whole viewdata pieces, show a three-dimensional picture on display screen, the subregion of realizing showing in the three-dimensional picture mode three-dimensional data.Further, be loaded under display resolution and load the data volume that regional data volume is less than three-dimensional data, in the subsequent load process, can accelerate loading efficiency.
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the application's part embodiment, rather than whole embodiment.Embodiment based in the application, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the application's protection.
Refer to Fig. 1, the process flow diagram that it shows a kind of three-dimensional data method for visualizing that the embodiment of the present application provides can comprise the following steps:
Step 101: obtain the load information of the three-dimensional data of user's input, generate loading zone corresponding to load information.
Be understandable that: when the user wishes to show certain subregion of three-dimensional data with three-dimensional picture on the display screen of electronic equipment, in electronic equipment, input the load information of three-dimensional data, this load information will load regional size and shape for controlling.Wherein load information can comprise: loading zone domain information and logic flag information, and wherein the loading zone domain information is to load regional size information, logic flag information is for the shape in controlled loading zone.Electronic equipment can, according to loading zone domain information and logic flag information, generate and load zone.
Step 102: determine and load the data block that under regional display resolution and described display resolution, described loading zone comprises.
Wherein, loading regional display resolution is to load the resolution of zone in display screen, and its zone that can form by view area and the projection in view area is determined.View area is the maximum magnitude that can show for figure in display screen.If the figure procedure for displaying is regarded as to drawing, the view area canvas size of use that is equivalent to paint so.The zone that projection in view area forms is to load the view field that zone obtains after the view area projection, and this view field can equal described view area, also can account for the subregion of view area.
In the embodiment of the present application, load zone and load the view field of regional outermost layer in view area in the view field of view area.Determine that the process that loads regional display resolution can be:
At first obtain and load the view field of regional outermost layer in view area; Next calculates the ratio of view field and view area, and as D1 be take view field's area that pixel obtains as unit, D2 be take the view area area that pixel obtains as unit, calculates the ratio R=D1/D2 of the ratio of D1 and D2 as view field and view area.Then obtain loading regional display resolution according to formula D=R * (L-1), the progression that wherein L is resolution, the progression of this resolution is the greatest level number of equipment resolution that demonstration can be provided, when ratio R is greater than 1, it is set to 1, otherwise carries out the calculating of display resolution according to the actual value of R.From the computing formula of display resolution, can find out, along with the increase of ratio R, display resolution increases step by step from 0 to L-1 resolution, and 0 class resolution ratio is minimum, and the L-1 class resolution ratio is the highest.
Well known to a person skilled in the art, the display resolution of larger its requirement of data volume is larger, load the subregion of zone as three-dimensional data, its display resolution is less than the display resolution of three-dimensional data, therefore after determining display resolution, also needing further to determine under this display resolution needs to be loaded into the regional data block of loading.Be less than the data volume of three-dimensional data owing to being loaded into the regional data volume of loading under display resolution, so can accelerate loading efficiency in the subsequent load process.
Be loaded in the embodiment of the present application and load regional data block three-dimensional data is divided equally after sampling to having display resolution and having the data block of identical voxel of obtaining.Its process can be: first to preset voxel, three-dimensional data is divided equally, obtained having with three-dimensional data the data block of identical display resolution; And then these data blocks are sampled and obtained the data block than under the display resolution of the low one-level of the display resolution of three-dimensional data ..., the like, until obtain the data block under first degree display resolution.
Take based on Octree storage three-dimensional data is example, as shown in Figure 2 with, octree structure carries out piecemeal to three-dimensional data, the data block that piecemeal obtains is as the data in the leaf node of Octree, and stores in the Octree file.In Octree, the resolution of the data block of same layer node is identical, and the data block of last layer node obtains by the sampling of the data block to next node layer.
Figure 3 illustrates and how from the data block of next node layer, to sample and to obtain the data block of last layer node.It should be noted that: when being sampled, need to from next node layer, be under the jurisdiction of in the data block of child node of last layer node and sample, what is called is subordinate to and refers to that the last layer node is the father node of eight nodes in next node layer, and these eight child nodes that node is this father node.In the Octree shown in Fig. 2, the membership of levels node adopts the arrow mark, first node as second layer node, first to eight node in the 3rd node layer is the child node that is under the jurisdiction of this node, first node of second layer node carries out the data block sampling from these eight child nodes, obtains the data block of first node of the second layer.
Due to the last layer node be from be under the jurisdiction of its in eight nodes of one deck sampling obtain data block, so the resolution of the data block of last layer node is less than the resolution of the data block of next node layer.And the data block of the last all nodes of one deck comprises whole three-dimensional datas.
Step 103: carry out cutting to loading zone, obtain loading all viewdata pieces that zone comprises, wherein the viewdata piece is to be loaded into to load in regional data block visible data block in the what comes into a driver's body.
Be understandable that: viewing area is the zone that can view by observation point, the camera of take describes as example as observing device, the light beam convergent point of camera can be used as observation point, the light beam that camera converges forms one and take the centrum that observation point is summit in space, and this centrum is by front cutting plane and yon clipping plane cutting, form a pyramid between front cutting plane and yon clipping plane, this pyramid region is called the what comes into a driver's body, as shown in Figure 4.
Wherein, front cutting plane is called projection plane, and the object of observation in the what comes into a driver's body all is projected on this projection plane, and therefore, the zone of projection plane in the pyramid scope is called visibility region, and the object of observation that is positioned at the what comes into a driver's body is all visible; And projection plane is called invisible area in the zone beyond the pyramid scope, be positioned at the external object of observation of what comes into a driver's invisible.
When the object of observation is that while loading the regional data block comprised, the data block that is positioned at what comes into a driver's body inside fully is fully visible; The data block portions that partly is positioned at what comes into a driver's body inside is visible; The remainder data piece is for fully invisible.Be written into internal memory for fully visible and the visible data block of part as the viewdata piece, otherwise be not written into internal memory.Can further reduce the quantity that is written into internal storage data piece piece like this, only the data block in viewing area is written into to internal memory, reduce the consumption of unnecessary data block to internal memory.
The criterion that the specified data piece is fallen in the what comes into a driver's body fully is: eight summits of data block are all in six faces of what comes into a driver's body.The criterion that the specified data piece is partly fallen in the what comes into a driver's body is: data block have a summit at least in six faces of what comes into a driver's body.The criterion that the specified data piece is not fallen in the what comes into a driver's body fully is: all summits of data block are all beyond six faces of what comes into a driver's body.
That is to say, the criterion that the specified data piece is the viewdata piece is: at least one summit of data block is in six faces of what comes into a driver's body.The specified data piece is not that the criterion of viewdata piece is: all summits of data block are all beyond six faces of what comes into a driver's body.In actual deterministic process, can contrast by coordinate, process is as follows:
The coordinate on eight summits of each data block in loading zone and the coordinate of what comes into a driver's body are contrasted; If the coordinate at least one summit of described data block is included in the coordinate of what comes into a driver's body, the viewdata piece using described data block as described viewing area.
Wherein the coordinate on summit is included in the coordinate of what comes into a driver's body and satisfies condition: the what comes into a driver's body is enclosed and is formed by six bread, and each face is determined inboard and the outside of face by the normal vector of face.The inboard of face refers to the side in what comes into a driver's body inside, the side of the outside of face in the what comes into a driver's external body.When summit during in that side (inboard) that the face normal vector points to, during apex coordinate substitution plane equation its equation value for just, otherwise for bearing.Accordingly, when six plane equations of apex coordinate substitution are all timing, this summit is in what comes into a driver's body inside; Otherwise this summit is in the what comes into a driver's external body.
Step 104: according to what comes into a driver's body and display resolution, calculate respectively the locus of each viewdata piece at display screen.
Detailed process can be: according to coordinate system and the regional coordinate system of loading of what comes into a driver's body, the coordinate of viewdata piece is changed, obtained the coordinate of the viewdata piece of the coordinate system based on the what comes into a driver's body; According to display resolution, by the coordinate conversion of the viewdata piece of the coordinate system based on the what comes into a driver's body, be the locus of viewdata piece in display screen.
Step 105: load corresponding viewdata piece in the locus of each viewdata piece.
Be understandable that: while loading the viewdata piece, can be loaded according to the depth of field of viewdata piece.The order drawn near as the foundation depth of field, load successively corresponding viewdata piece on the locus of viewdata piece, according to the depth of field of each viewdata piece, the preferential greatly i.e. viewdata piece of distant place of the depth of field that loads, and then load the little i.e. viewdata piece nearby of the depth of field, to avoid the occlusion issue of viewdata piece.
In the embodiment of the present application, the depth of field of viewdata piece is kept in the sub-block chained list according to the order that draws near, this sub-block chained list is a chained list of safeguarding the data block information loaded, all can be according to loading regional cutting and display resolution dynamic creation sub-block chained list in each loading procedure.And the sub-block chained list is not stored actual data block, discharge the sub-block chained list and save to reach the purpose that loads required memory after loading completes.The data block information recorded in the sub-block chained list can comprise: the size of data block, the side-play amount between the linked list head of the depth of field of data block and data block and sub-block chained list.
Need explanation a bit: in above-mentioned the embodiment of the present application, logic flag adopts the macro definition mode, as follows:
ENABLE_X0=0x1,
ENABLE_Y0=0x2,
ENABLE_Z0=0x4,
INVERT_0=0x8,
ENABLE_X1=0x10,
ENABLE_Y1=0x20,
ENABLE_Z1=0x40,
INVERT_1=0x80,
ENABLE_X2=0x100,
ENABLE_Y2=0x200,
ENABLE_Z2=0x400,
INVERT_2=0x800,
OR_SELECT=0x1000,
INVERT_OUTPUT=0x2000,
SUB_VOLUME=ENABLE_X0|ENABLE_Y0|ENABLE_Z0,
EXCLUSION_BOX=SUB_VOLUME|INVERT_OUTPUT,
CROSS=ENABLE_X0|ENABLE_Y0|ENABLE_Y1|ENABLE_Z1|ENABLE_X2|ENABLE_Z2|OR_SELECT,
CROSS_INVERT=CROSS|INVERT_OUTPUT,
FENCE=ENABLE_X0|ENABLE_Y1|ENABLE_Z2|OR_SELECT,
FENCE_INVERT=FENCE|INVERT_OUTPUT。
Wherein, whether logic flag: ENABLE_X0, ENABLE_X1, ENABLE_X2 be effective for the minimum border xmin and the maximum boundary xmax that mean to load regional X-direction, as the minimum border xmin of X-direction and maximum boundary xmax when effective, mean to enable X-direction, now need to arrange ENABLE_X0=0x1, ENABLE_X1=0x10, ENABLE_X2=0x100.When effective, mean the forbidding X-direction as the minimum border xmin of X-direction and maximum boundary xmax, now do not need to arrange ENABLE_X0, ENABLE_X1, ENABLE_X2.
Whether logic flag: ENABLE_Y0, ENABLE_Y1, ENABLE_Y2 be effective for the minimum border ymin and the maximum boundary ymax that mean to load regional Y direction, as the minimum border ymin of Y direction and maximum boundary ymax when effective, mean to enable Y direction, now need to arrange ENABLE_Y0=0x2, ENABLE_Y1=0x20, ENABLE_Y2=0x200.When effective, mean the forbidding Y direction as the minimum border ymin of Y direction and maximum boundary ymax, now do not need to arrange ENABLE_Y0, ENABLE_Y1, ENABLE_Y2.
Whether logic flag: ENABLE_Z0, ENABLE_Z1, ENABLE_Z2 be effective for the minimum border zmin and the maximum boundary zmax that mean to load regional Z-direction, as the minimum border zmin of Z-direction and maximum boundary zmax when effective, mean to enable Z-direction, now need to arrange ENABLE_Z0=0x4, ENABLE_Z1=0x40, ENABLE_Z2=0x400.When effective, mean the forbidding Z-direction as the minimum border zmin of Z-direction and maximum boundary zmax, now do not need to arrange ENABLE_Z0, ENABLE_Z1, ENABLE_Z2.
Pass through logic flag: ENABLE_X0=0x1, ENABLE_Y0=0x2, ENABLE_Z0=0x4, ENABLE_X1=0x10, ENABLE_Y1=0x20, ENABLE_Z1=0x40, ENABLE_X2=0x100, ENABLE_Y2=0x200, ENABLE_Z2=0x400 definition X, Y, tri-axial minimum and maximum boundary definitions of Z go out to load regional crop box.
Whether logic flag: INVERT_0, INVERT_1, INVERT_2 mean ENABLE_X0, ENABLE_Y0, ENABLE_Z0, ENABLE_X1, ENABLE_Y1, ENABLE_Z1, ENABLE_X2, ENABLE_Y2 and ENABLE_Z2 negate, if INVERT_0=0x8, INVERT_1=0x80, INVERT_2=0x800 are set need negate, otherwise not negate.
Logic flag: OR_SELECT means ENABLE_X0, ENABLE_Y0, and ENABLE_Z0, ENABLE_X1, ENABLE_Y1, ENABLE_Z1, ENABLE_X2, ENABLE_Y2 and ENABLE_Z2 are asked and return is cup.When OR_SELECT=0x1000 is set, carry out cup; When OR_SELECT is not set, carry out cap.
Logic flag: INVERT_OUTPUT means ENABLE_X0, ENABLE_Y0, and ENABLE_Z0, ENABLE_X1, ENABLE_Y1, ENABLE_Z1, ENABLE_X2, whether ENABLE_Y2 and ENABLE_Z2 are reversed.When INVERT_OUTPUT=0x2000 is set, reversed.When INVERT_OUTPUT is not set, do not reversed.
Determine and load regional X, Y and tri-axial minimum and maximum borders of Z when the loading zone domain information, define and load regional crop box: xmin and xmax determine minimum and the maximum boundary of X-direction; Ymin and ymax determine minimum and the maximum boundary of Y direction; Zmin and zmax determine the axial minimum of z and maximum boundary.
After the minimum and maximum border of these three directions is given, loads a zone minute following four-stage and generate:
Step 1: relative X-direction, Y direction and Z-direction adopt the mode of enabling or forbidding to be arranged.Each direction of principal axis has the logic flag of himself: enable or forbid.Each is axial enables or forbids setting and be independent of other both directions, comprising:
Enable X-direction: minimum and the maximum boundary of the X-direction that xmin and xmax are definite work, this logic flag by ENABLE_X0, ENABLE_X1 are set, ENABLE_X2 completes.
Minimum and the maximum boundary of forbidding X-direction: xmin and the definite X-direction of xmax are inoperative, this logic flag by ENABLE_X0, ENABLE_X1 are not set, ENABLE_X2 completes.
Enable Y direction: minimum and the maximum boundary of the Y direction that ymin and ymax are definite work, this logic flag by ENABLE_Y0, ENABLE_Y1 are set, ENABLE_Y2 completes.
Minimum and the maximum boundary of forbidding Y direction: ymin and the definite Y direction of ymax are inoperative, this logic flag by ENABLE_Y0, ENABLE_Y1 are not set, ENABLE_Y2 completes.
Enable Z-direction: minimum and the maximum boundary of the Z-direction that zmin and zmax are definite work, this logic flag by ENABLE_Z0, ENABLE_Z1 are set, ENABLE_Z2 completes.
Minimum and the maximum boundary of forbidding Z-direction: zmin and the definite Z-direction of zmax are inoperative, this logic flag by ENABLE_Z0, ENABLE_Z1 are not set, ENABLE_Z2 completes.
The logic flag of using in step 1 has: ENABLE_X0=0x1, ENABLE_Y0=0x2, ENABLE_Z0=0x4, ENABLE_X1=0x10, ENABLE_Y1=0x20, ENABLE_Z1=0x40, ENABLE_X2=0x100, ENABLE_Y2=0x200, ENABLE_Z2=0x400, mean to enable X, Y and three directions of Z axis.
Minimum and maximum boundary setting divides to be carried out for three times, for the first time by enabling or forbid ENABLE_X0, ENABLE_Y0, tri-logic flag of ENABLE_Z0 arrange minimum and maximum boundary, these three logic flag are called the 0th; For the second time by enabling or forbid ENABLE_X1, ENABLE_Y1, tri-logic flag of ENABLE_Z1 arrange minimum and maximum boundary, these three logic flag are called the 1st; For the third time by enabling or forbid ENABLE_X2, ENABLE_Y2, tri-logic flag of ENABLE_Z2 arrange minimum and maximum boundary, these three logic flag are called the 2nd.
Step 2: determine whether to be reversed in the value that step 1 obtains, get the supplementary set of its pixel.Each (the 0th, the 1st, the 2nd) has the reversion sign (INVERT_0, INVERT_1, INVERT_2) of himself, and the setting of each all is independent of other two.As INVERT_0=0x8, INVERT_1=0x80, INVERT_2=0x800, mean the value obtained in inversion step 1.
Step 3: to the 0th, asked for the 1st and the 2nd and hand over or cup.Computing is used logic flag position OR_SELECT to be specified.Arrange the 0th that logic flag OR_SELECT=0x1000 shows to arrange in step 1, between the 1st and the 2nd three, will carry out union; Do not arrange the 0th that logic flag OR_SELECT shows to arrange in step 1, between the 1st and the 2nd three, will be shipped calculation.
Step 4: whether determine the result of inversion step 3, to generate final loading zone.Whether use logic flag INVERT_OUTPUT to specify reverses.Can be to the collection of supplement as a result of step 3, using the structure after reversion as final loading zone if logic flag INVERT_OUTPUT=0x2000 is set.If logic flag INVERT_OUTPUT is not set, the result of step 3 will become final loading zone.
With this, effect that corresponding loading zone elaborates logic flag is set, three-dimensional data (X, Y below in conjunction with concrete the setting, Z) size of direction is 300x400x300, (X, Y in the loading zone domain information, Z) minimax boundary value (xmin, ymin, the zmin of three directions, xmax, ymax, zmax) be made as (100,100,100,200,200,200).
Following code has provided by the ENABLE_X0 of the 0th and the loading zone of ENABLE_Z0 formation are set, and gray area shown in Fig. 5 is for loading zone.Code is as follows:
xmin=100;xmax=200;
ymin=100;ymax=200;
zmin=100;zmax=200;
myROI->box.setValue（xmin，ymin，zmin，xmax，ymax，zmax）;
MyROI-> flags.setValue(ENABLE_X0|ENABLE_Z0), ENABLE_X0 and ENABLE_Z0 are enabled in its expression, and the volume data of loading is 100x400x100.
Following code has provided by the loading zone of the ENABLE_Y1 formation of the 1st is set, and loads zone gray area as shown in Figure 6, and code is as follows:
xmin=100;xmax=200;
ymin=100;ymax=200;
zmin=100;zmax=200;
myROI->box.setValue（xmin，ymin，zmin，xmax，ymax，zmax）;
MyROI-> flags.setValue(ENABLE_Y1), ENABLE_Y1 is enabled in its expression, and the volume data of loading is 300x100x300.
Below code provided in step 3 OR_SELECT be not set, obtain the 0th and the 1st 's common factor, its loading zone of asking knot fruit correspondence is gray area as shown in Figure 7:
xmin=100;xmax=200;
ymin=100;ymax=200;
zmin=100;zmax=200;
myROI->box.setValue（xmin，ymin，zmin，xmax，ymax，zmax）;
MyROI-> flags.setValue(ENABLE_X0|ENABLE_Z0|ENABLE_Y1), the volume data of loading is 100x100x100.
Below code provided in step 3 OR_SELECT be set, obtain the 0th and the 1st 's union, the reversion of step 4 is not used, and asks loading zone corresponding to result also gray area as shown in Figure 8:
xmin=100;xmax=200;
ymin=100;ymax=200;
zmin=100;zmax=200;
myROI->box.setValue（xmin，ymin，zmin，xmax，ymax，zmax）;
MyROI-> flags.setValue(ENABLE_X0|ENABLE_Z0|ENABLE_Y1|OR_SELECT), the volume data that this loading zone loads is the union of 100x400x100 and 300x100x300.
Below code provided in step 3 OR_SELECT be set, obtain the 0th and the 1st 's union, and used the reversion of step 4, the loading zone of generation is gray area as shown in Figure 9:
xmin=100;xmax=200;
ymin=100;ymax=200;
zmin=100;zmax=200;
myROI->box.setValue（xmin，ymin，zmin，xmax，ymax，zmax）;
MyROI-> flags.setValue(ENABLE_X0|ENABLE_Z0|ENABLE_Y1|OR_SELECT|I NVERT_OUTPUT), the volume data that this loading zone loads is the volume data except the union of 100x400x100 and 300x100x300 in three-dimensional data.
Loading corresponding to other several predefined logic flag zone as Figure 10 (a) to 10(f) as shown in, these loadings Regional Representative the geometrical body of some given shapes, its code comprises as follows:
SUB_VOLUME=ENABLE_X0|ENABLE_Y0|ENABLE_Z0, its correspondence loads zone as shown in Figure 10 (a) shows.
EXCLUSION_BOX=SUB_VOLUME|INVERT_OUTPUT, its corresponding zone that loads as shown in Figure 10 (b).
CROSS=ENABLE_X0|ENABLE_Y0|ENABLE_Y1|ENABLE_Z1|ENABLE_X2| ENABLE_Z2|OR_SELECT, its corresponding zone that loads as shown in Figure 10 (c).
CROSS_INVERT=CROSS|INVERT_OUTPUT, its corresponding zone that loads as shown in Figure 10 (d).
FENCE=ENABLE_X0|ENABLE_Y1|ENABLE_Z2|OR_SELECT, its corresponding zone that loads as shown in Figure 10 (e).
FENCE_INVERT=FENCE|INVERT_OUTPUT, its correspondence loads zone as shown in Figure 10 (f).
Also need explanation a bit: when loading visualized data and showing three-dimensional data with three-dimensional picture, also support user's rotation, convergent-divergent and drag operation, wherein rotation is that the user pulls three-dimensional data is carried out to three-dimensional rotation by mouse; Convergent-divergent is that the user operates three-dimensional data is advanced and zooms out by mouse roller; Pull is that the user pulls the three-dimensional data scope is selected by mouse.
Wherein these two kinds of user's operations of Rotation and Zoom are passed through to change camera parameter, and then correspondingly revise what comes into a driver's body parameter, affect indirectly position and the size of three-dimensional data.Scene camera parameter and what comes into a driver's body parameter are basically identical, but these parameters are placed in camera and two independent objects of what comes into a driver's body, its total parameter comprise camera position, direction of observation, nearly cutting identity distance from, away from the cutting identity distance from, width angle, elevation angle, the ratio of width to height x/y etc., the relation of these parameters and what comes into a driver's body is as shown in figure 11.The change of what comes into a driver's body parameter, can make display resolution and viewdata piece change, so when definite user three-dimensional data is rotated with zoom operations after, need to redefine display resolution and viewdata piece, re-execute step 102 and subsequent step thereof.
Operate direct change and load regional outermost layer and pull this user, even loading regional change, now make equally display resolution and viewdata piece change, so after definite user carries out drag operation to three-dimensional data, display resolution and viewdata piece be need to redefine, step 102 and subsequent step thereof re-executed.
With said method, embodiment is corresponding, and the embodiment of the present application also provides a kind of three-dimensional data visualization device, and its structural representation as shown in figure 12, can comprise: generation unit 11, determining unit 12, cutting unit 13, computing unit 14 and loading unit 15.Wherein,
Generation unit 11, the load information for the three-dimensional data that obtains user input, generate loading zone corresponding to load information.
Concrete, generation unit 11 obtains loading zone domain information and the logic flag information of the 3D solid data of user's input, according to loading zone domain information and logic flag information, generate and load zone, wherein the loading zone domain information is to load regional size information, and logic flag information is for the shape in controlled loading zone.In the embodiment of the present application, generation unit 11 can be realized referring to the above-mentioned loading zone generating code of enumerating and corresponding explanation, this application is no longer set forth.
Determining unit 12, need to be loaded into the regional data block of loading for determining to load under regional display resolution and display resolution.
In the embodiment of the present application, the structural representation of determining unit 12 refers to shown in Figure 13, can comprise: obtain subelement 121, the first computation subunit 122, the second computation subunit 123 and definite subelement 124.Wherein,
Obtain subelement 121, for obtaining, load the view field of regional outermost layer in view area, wherein view area is the maximum magnitude that can show for figure in display screen.If the figure procedure for displaying is regarded as to drawing, the view area canvas size of use that is equivalent to paint so.The zone that projection in view area forms is to load the view field that zone obtains after the view area projection, and this view field can equal described view area, also can account for the subregion of view area.
The first computation subunit 122, for calculating the ratio of view field and view area.As D1 be take view field's area that pixel obtains as unit, D2 be take the view area area that pixel obtains as unit, calculates the ratio R=D1/D2 of the ratio of D1 and D2 as view field and view area.
The second computation subunit 123, for according to formula D=R * (L-1) obtain loading regional display resolution, the progression that wherein L is resolution, R is ratio, and it is set to 1 when R is greater than 1, otherwise carry out the calculating of display resolution according to the actual value of R.From the computing formula of display resolution, can find out, along with the increase of ratio R, display resolution increases step by step from 0 to L-1 resolution, and 0 class resolution ratio is minimum, and the L-1 class resolution ratio is the highest.
Determine subelement 124, for determining under display resolution, need to be loaded into the regional data block of loading.Wherein be loaded into and load regional data block three-dimensional data is divided equally after sampling to having display resolution and having the data block of identical voxel of obtaining.Its process can be: first to preset voxel, three-dimensional data is divided equally, obtained having with three-dimensional data the data block of identical display resolution; And then these data blocks are sampled and obtained the data block than under the display resolution of the low one-level of the display resolution of three-dimensional data, the like, until obtain the data block under first degree display resolution, the related description that specifically can consult Fig. 2 and Fig. 3.
Be understandable that, larger its demand to internal memory of data volume is just larger, load the subregion of zone as three-dimensional data, its display resolution is subject to load the impact of zone in the view area projected area, can be less than the display resolution of three-dimensional data, therefore after determining display resolution, also needing further to determine under this display resolution needs to be loaded into the regional data block of loading.Be less than the data volume of three-dimensional data owing to being loaded into the regional data volume of loading under low display resolution, so can accelerate loading efficiency in the subsequent load process.
Cutting unit 13, for to loading zone, carrying out cutting, obtain loading all viewdata pieces that zone comprises, wherein the viewdata piece is to be loaded into to load in regional data block visible data block in the what comes into a driver's body.
Concrete, cutting unit 13 specifically for: will load the coordinate on eight summits of each regional data block and the coordinate of what comes into a driver's body and be contrasted.If the coordinate at least one summit of data block is included in the coordinate of what comes into a driver's body, the viewdata piece using data block as viewing area.
Wherein the coordinate on summit is included in the coordinate of what comes into a driver's body and satisfies condition: the what comes into a driver's body is enclosed and is formed by six bread, and each face is determined inboard and the outside of face by the normal vector of face.The inboard of face refers to the side in what comes into a driver's body inside, the side of the outside of face in the what comes into a driver's external body.When summit during in that side (inboard) that the face normal vector points to, during apex coordinate substitution plane equation its equation value for just, otherwise for bearing.Accordingly, when six plane equations of apex coordinate substitution are all timing, this summit is in what comes into a driver's body inside; Otherwise this summit is in the what comes into a driver's external body.
Computing unit 14, for foundation what comes into a driver's body and display resolution, calculate respectively the locus of each viewdata piece at display screen.
Loading unit 15, load corresponding viewdata piece for the locus at each viewdata piece.
In the embodiment of the present application, computing unit 14 specifically for: according to the coordinate system of what comes into a driver's body with load regional coordinate system, the coordinate of viewdata piece is changed, is obtained the coordinate of the viewdata piece of the coordinate system based on the what comes into a driver's body.According to display resolution, by the coordinate conversion of the viewdata piece of the coordinate system based on the what comes into a driver's body, be the locus of viewdata piece in display screen.
Loading unit 15 is specifically for the depth of field of obtaining each viewdata piece.The order drawn near according to the depth of field loads corresponding viewdata piece successively on the locus of viewdata piece.According to the depth of field of each viewdata piece, preferentially load the greatly i.e. viewdata piece at a distance of the depth of field, and then load the little i.e. viewdata piece nearby of the depth of field, to avoid the occlusion issue of viewdata piece.
In the embodiment of the present application, the depth of field of viewdata piece is kept in the sub-block chained list according to the order that draws near, this sub-block chained list is a chained list of safeguarding the data block information loaded, all can be according to loading regional cutting and display resolution dynamic creation sub-block chained list in each loading procedure.And the sub-block chained list is not stored actual data block, discharge the sub-block chained list and save to reach the purpose that loads required memory after loading completes.The data block information recorded in the sub-block chained list can comprise: the size of data block, the side-play amount between the linked list head of the depth of field of data block and data block and sub-block chained list.
It should be noted that, each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For system class embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part gets final product referring to the part explanation of embodiment of the method.
Finally, also it should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make the process, method, article or the equipment that comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.In the situation that not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Being divided into various unit with function while for convenience of description, describing above system describes respectively.Certainly, when implementing the application, can realize the function of each unit in same or a plurality of software and/or hardware.
As seen through the above description of the embodiments, those skilled in the art can be well understood to the mode that the application can add essential general hardware platform by software and realizes.Understanding based on such, the part that the application's technical scheme contributes to prior art in essence in other words can embody with the form of software product, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out the described method of some part of each embodiment of the application or embodiment.
Above a kind of three-dimensional data method for visualizing and the device that the application is provided is described in detail, applied specific case herein the application's principle and embodiment are set forth, the explanation of above embodiment is just for helping to understand the application's method and core concept thereof; Simultaneously, for one of ordinary skill in the art, the thought according to the application, all will change in specific embodiments and applications, and in sum, this description should not be construed as the restriction to the application.
Claims (10)
1. a three-dimensional data method for visualizing, is characterized in that, comprising:
Obtain the load information of the three-dimensional data of user's input, generate the loading zone that described load information is corresponding;
Determine under display resolution that described loading is regional and described display resolution and need to be loaded into the regional data block of described loading, wherein said data block is divided equally after sampling to described three-dimensional data having described display resolution and having the data block of identical voxel of obtaining;
Cutting is carried out in described loading zone, obtain the described all viewdata pieces that zone comprises that load, wherein said viewdata piece is to be loaded into to load in regional data block visible data block in the what comes into a driver's body;
According to described what comes into a driver's body and described display resolution, calculate respectively the locus of each described viewdata piece at display screen;
Locus at each described viewdata piece loads corresponding described viewdata piece.
2. method according to claim 1, is characterized in that, determines that the regional display resolution of described loading comprises:
Obtain the view field of the regional outermost layer of described loading in view area, wherein said view area is the maximum magnitude that can show for figure in display screen;
Calculate the ratio of described view field and described view area;
According to formula D=R * (L-1) obtain the regional display resolution of described loading, the progression that wherein L is resolution, R is ratio, and it is set to 1 when R is greater than 1.
3. method according to claim 2, is characterized in that, cutting is carried out in described loading zone, obtains the described all viewdata pieces that zone comprises that load, and comprising:
The coordinate on eight summits of each data block in described loading zone and the coordinate of described what comes into a driver's body are contrasted;
If the coordinate at least one summit of described data block is included in the coordinate of described what comes into a driver's body, the viewdata piece using described data block as described viewing area.
4. method according to claim 3, is characterized in that, according to described what comes into a driver's body and described display resolution, the locus of calculating respectively each described viewdata piece comprises:
According to the coordinate system of described what comes into a driver's body and the coordinate system in described loading zone, the coordinate of described viewdata piece is changed, obtain the coordinate of the viewdata piece of the coordinate system based on described what comes into a driver's body;
According to described display resolution, by the coordinate conversion of the viewdata piece of the described coordinate system based on described what comes into a driver's body, be the locus of described viewdata piece in display screen;
Locus at each described viewdata piece loads corresponding described viewdata piece, comprising: the depth of field of obtaining each described viewdata piece; The order drawn near according to the depth of field loads corresponding described viewdata piece successively on the locus of described viewdata piece.
5. according to the described method of claim 1 to 4 any one, it is characterized in that, obtain the load information of the three-dimensional data of user's input, generate the loading zone that described load information is corresponding, comprising:
Obtain loading zone domain information and the logic flag information of the 3D solid data of user's input, wherein said loading zone domain information is the regional size information of described loading, and described logic flag information is for controlling the regional shape of described loading;
According to described loading zone domain information and described logic flag information, generate described loading zone.
6. a three-dimensional data visualization device, is characterized in that, comprising:
Generation unit, the load information for the three-dimensional data that obtains user input, generate the loading zone that described load information is corresponding;
Determining unit, need to be loaded into the regional data block of described loading for determining under display resolution that described loading is regional and described display resolution, wherein said data block is divided equally after sampling to described three-dimensional data having described display resolution and having the data block of identical voxel of obtaining;
The cutting unit, for cutting is carried out in described loading zone, obtain the described all viewdata pieces that zone comprises that load, and wherein said viewdata piece is to be loaded into to load in regional data block visible data block in the what comes into a driver's body;
Computing unit, for according to described what comes into a driver's body and described display resolution, calculate respectively the locus of each described viewdata piece at display screen;
Loading unit, load corresponding described viewdata piece for the locus at each described viewdata piece.
7. device according to claim 6, is characterized in that, described determining unit comprises:
Obtain subelement, for obtaining the view field of the regional outermost layer of described loading in view area, wherein said view area is the maximum magnitude that can show for figure in display screen;
The first computation subunit, for calculating the ratio of described view field and described view area;
The second computation subunit, for foundation formula D=R * (L-1) obtain the regional display resolution of described loading, the progression that wherein L is resolution, R is ratio, and it is set to 1 when R is greater than 1;
Determine subelement, for determining under described display resolution, need to be loaded into the regional data block of described loading.
8. device according to claim 7, is characterized in that, described cutting unit specifically for: the coordinate on eight summits of described each data block that loads zone and the coordinate of described what comes into a driver's body are contrasted; If the coordinate at least one summit of described data block is included in the coordinate of described what comes into a driver's body, the viewdata piece using described data block as described viewing area.
9. device according to claim 8, it is characterized in that, described computing unit specifically for: according to the coordinate system of described what comes into a driver's body and the coordinate system in described loading zone, coordinate to described viewdata piece is changed, and obtains the coordinate of the viewdata piece of the coordinate system based on described what comes into a driver's body; According to described display resolution, by the coordinate conversion of the viewdata piece of the described coordinate system based on described what comes into a driver's body, be the locus of described viewdata piece in display screen;
Described loading unit is specifically for the depth of field of obtaining each described viewdata piece; The order drawn near according to the depth of field loads corresponding described viewdata piece successively on the locus of described viewdata piece.
10. according to the described device of claim 6 to 9 any one, it is characterized in that, described generation unit is specifically for loading zone domain information and the logic flag information of obtaining the 3D solid data of user input, according to described loading zone domain information and described logic flag information, generate described loading zone, wherein said loading zone domain information is the regional size information of described loading, and described logic flag information is for controlling the regional shape of described loading.
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